Yes, it was Windows 8.1 Update 1, because you received the same error. We need to revert to an older Windows PE, this will help us obtain the raw data which is causing the error; unfortunately we cannot access that raw data on Windows 8.1 Update 1 because it is already being processed by the WoF (Windows Overlay Filter) driver being used for compression.

I will try to put together a Windows 8 x86 PE for you now and upload it, so you can revert to your working image.